Changing passwords for any mailbox should be possible through the Hamro.Cloud control panel.
1. Sign in to Hamro.Cloud and select Manage Hosting.
2. Select Manage on the hosting package that contains the mailbox you wish to change the password  on.
3. Choose Email Accounts under Email.
4. Essentially find your mailbox and enter another password  and click Update. Your new password will have been effectively saved.
Note: You won't probably recover your old password for the mailbox. We do this to expand your security.